michael.c

#include <stdio.h>
#include <stdlib.h>

int add_up (int *a, int** b, int num_elements);

int main()
{
    int orders[5] = {100, 220, 37, 16, 98};
    int *orders_sum = (int *)malloc(sizeof(int) * 5);

    if (orders_sum == NULL) {
        printf("Memory not allocated.\n");
        exit(0);
    }

    printf("Total orders is %d\n", add_up(orders, &orders_sum, 5));

    for (int i = 0; i < 5; ++i)
    {
        printf("sum of the elements at %d is %d\n", i, orders_sum[i]);
    }


    return 0;
}

int add_up (int *a, int** b, int num_elements)
{
   int total = 0;

   for (int k = 0; k < num_elements; ++k)
   {
        total += a[k];
   }

   for (int i = 0; i < num_elements; ++i)
   {
        for (int k = num_elements - 1; i <= k; --k)
        {

            (*b)[i] += a[k];
        }
    }

    return (total);
}